Wire line shock absorber



st. 11, 1932. 1.. R. PIERCE 1,882,161

WIRE LINE SHOCK ABSORBER Filed Feb. 25. 1950 INVENTOR. LEAO) a flame Patented Oct. 11, 1932 LEROY R. PIERCE, OF KEYSTONE, OKLAHOMA WIRE Linn srrooK ABSORBER Application med February 25, 1930. Serial No. 431,208.

7 This invention relates to oil and other well rigs and more particularly to an attachment -for' su'ch rigs utilizing a wire line drilling cable in lieu' of the usual manila drilling cable. i

i 7 One of the primary objects ofmy invention is the provision of a novel shock absorber for the wire line drilling cable of a well rig, whereby a wire line can be successfully used is with such rigs in lieu of the manila cable.

In ;well,drilling a certain necessary give is inherent in the ordinary manila cable, which is missing in the wire line cable and which prevents the efiective use of such wirev line cable on a drilling rig.

It is therefore, another prime object of my invention to provide a shock absorbing and tensioning device for engaging a wire line drilling cable carried directly by the Well rig 2a and arranged between the bull wheel or windlass and the derrick, said shock absorbing and tensioning device permitting the desired give to the wire line cable.

A further important object of my inven- 25 tion is the provision of novel means for constructing the shock absorbing and wire line tensioning device, whereby an efficient structure will be had which can be conveniently associated with an ordinary well rig for rea; ceiving the wire line cable at an intermediate portion thereof. 7 A still further object of my invention is to provide a wire line shock absorbing and tensioning device for well rigs of the above character, which will be durable and efficient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement'and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawing, in which drawing Figure l is a fragmentary side elevation of an well rig showing parts thereof broken away and in section with my improved device incorporated therewith, .my device being shown in side elevation.

Figure 2 is a front elevation-of my im-.

proved device showing parts thereof in sec tion.

Figure 3 is a vertical section through the same taken on the line 33 of Figure 2 looking in'the direction of the arrows. f v

Figure 4.- is a detail section taken "on the line 4& of Fig. 2, looking in thedirection of the arrows.

Referring to the drawing in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates my improved device and B a well rig withwhich the same can be associated.

.The well rig B may be of preferred as V or conventional character and includes the usual lower frame work '10, platform 11, and derrick 12. The lower frame work 10 includes an end transverse beam 13 arranged below the bull wheel 14 around which is 7 coiled the wire line drilling .cable 15.: As shown, the wire line drilling cable 15 extends from the bull wheel 14 over a suitable guide roller or pulley 16 and then up and over the top of the derrick and the crown pulley carried thereby. In as much as the well rig B is of conventional construction: further description thereof will not be given in this specification. My improved line wire shock absorber and so tensioning device'for wire line cable 15 comprisesa sheave or pulley wheel 20 rotatably' mounted upon an axle or shaft 21 carried by the pulley frame or block 22 which may be 7 formed of sheet metal. As shown, the pulley block or frame 22 is provided with an enlarged open base 23 having its inner lower 7 end provided with an opening for the recep' tion of the slidebolt 24, the head 25 of which engages the innerface of the base 2310f the '90 pulley frame or block 22. One side of the frame is provided with a slot or opening 26 whereby the cable can be readily introduced into the block so that the same can engage around the pulley wheel or sheave 20. This slot 26 can be normally closed by the use of any preferred type of latch 27. The slide bolt 2 1'also' slidablyextends through a protecting plate 28 which is connected by means of'lag screws 29 or the like to the transverse 31 f o I? beam 13 of the well rig frame and the slide bolt slidably extends through an opening formed in said beam.

The lower surface of the beam 13 has connected thereto by the use of lag screws 31 or the like an angle iron protecting strip 32 which strip at its central portion carries a hollow guide boss or collar 32 and adjacent to its opposite ends it carries the hollow bosses or guide collars 33, As clearly shown in Figure 3 of the drawing, the slide bolt 7 32 and through the central sleeve 35 of the 7 tension frame 36. Threaded on thelower. or

24 extends throughthe central boss or collar outer end of the slide bolt or strain rod 24 isa nut 37 which engages theiouter lower face of the tension frame36. The tension frame 36 on each side of the central sleeve 35 is provided with side sleeves 38 which slidably receive the side guide rods 39 which are secured toor formed on. the guide bosses 33. The slide bolt or'strain rod 24 and the guide rods 39 receivethe compression springs 40 which are interposed between the tension frame 36 and the bosses 32 and 33 and normally function to draw the frame 36 away from the beam 13 andconsequently the sheave or pulley wheel 20 toward said beam. As clearly shown'in-Figure 1 of the drawing, the sheave. or pulley wheel 20 engages the wire line cable 15 and thus exerts a continuous tension thereon and any strainon the cable will be absorbed by the springs '40 and f p due to the construction of the device andthe v arrangement thereof on the frame the maximum amount of benefit willbederived from for engaging the wire line cable of a Well rig.

2. A shock absorbing device particularly designed for use in connection with well rigs comprising an angle iron protecting strip adapted to fit over the under side of a bracing beam of a well rig,' a guiding boss formed centrally of said protecting strip, a slide bolt slidablymounted through-said boss and extending through said bracing beam at an angle, of approximately forty-five degrees to the transverse axis'of said bracing beam, a protecting plate mounted adjacent said pro tecting strip' and in line with said boss for constituting asu-pport for the inner end of said slide bolt, means carried by the inner end of said sl ide boltfor engaging ther line wireof a=wel l-ri g,' elongated tension trame.

secured to the outer-end: of said slide belt, a

spring mounted upon said slide bolt interthe resilient mounting of the pulley wheel and the engagement thereof with said wire line. Y

Changes in details may be. made without departing from the spirit or theiscope of this invention, but 7 What I claim as new is:

1. A shock absorbing device for use in connection with well rigs comprising an angle iron protecting strip adapted to fit over the under and outer side of a bracing beam of a rig, a slide bolt slidably mounted through said protecting strip and extending through said bracing beam at an angle of approxi mately forty-five degrees to the transverse axis of said bracing. beam, a tension frame secured to the outer end of said slide bolt, a plurality of guide rods carried by said protecting strip and extending in parallel relation with respect to said slide bolt and slidably mounted through said tension frame,

coil springs interposed between said tension frame and said protecting strip and mounted upon said slide bolt and guide rods for nor- 'mally urging said tension frame outwardly with respect to said protecting strip, said guidev rods constituting means'for resisting v lateral strain upon said slide bolt, andmeans carried by the inner 'endiof said'islide'bolt r 

